Nail-furnace



(NoModel.) A

G. ROWE.

v NAIL PURNAGE. No. 345,260. Patented July 6, 1886.

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Parnsrr @rtreej GO'ITLOB ROVE, OF DANVILLE, PENNSYLVANIA.

NAIL-FURNACE.

SPECIFICATION forming part of Letters Patent No. 345,260, dated July 6,1886.r

l Application filed November 9, 1895. Serial No.182204. v(No model.)

To all whom, it may concern: Y

Be it known that I, GoTTLoB Rows, a citizen of the United States, residing in Danville, Monteur county, Pennsylvania, have invented certain Improvements in Nail-Furnaces, of which the following is a specication.

My invention consists of an improved construction of heating-furnace, more especially designed for use' in the manufacture of nails and tacks, the furnace being applicable both for the heating of plates and bluing of tacks, as fully described hereinafter.

In the accompanying drawings, Figure l is a longitudinal section of my improved furnace on the line l 2, Fig. 2. Fig. 2 is a sectional plan on the line 3 4, Fig. l. Fig. 3 is a vertical section on the line 5 6, Fig. I; and Figs. 4t and 5 are longitudinal and transverse seetions of a modified form of furnace.

A A are the outer walls of the furnace, containing in its upper part the combustion or heating chamber B, into whichair is supplied from above, and preferably at the sides also, through openings a throughout the length of the chamber and leading from longitudinal passages c', provided with a valved supply pipe or pipes, E, for the air-blast.

In the tloor b of the furnace adjacent to the side walls are arranged at suitable" distances apart, a number of vertical passages, d d', leading from two regenerative chambers, D D, on opposite sides of the central wall, F, Fig. 3, and below these regenerative chambers are i longitudinal gas-fluesff/,leading from a common gas-supply line, G, and provided with a common damper or valve, g. The lines ff communicate through openings h h withoutlet-iiues II H,connecting'with a common iiue, J, provided with a damper, j, and leading to the chimney K. By adjusting the dampers g and j to the position shown in Fig. 2 the incoming gas is caused to enter the line f and the flue II,which, however, is closed at its outer end, and thence to pass up through the regenerative chamber D, Fig. 3, into the combustion-chamber, where it meets the air-supply, and combustion takes place. The products of combustion then pass down through the regenerative chamber D and flues h and H to the chimney. Vhen the brick-work in the regenerative chamber D has become heated by the escaping products of combustion, the

dampers g and j are reversed to the positions indicated by dotted lines in Fig. 2, so that the supply of gas will pass up through the hot regenerative chamber D and become heated on its way to the combustion-chamber, while the products of combustion will pass down through the regenerative chamber D on their way to the chimney. When the regenerative-chamber D in its turn becomes heated, and the chamber D cold, the dampers are reversed again to their first positions.

` It will be observed that thetlues H H eX- tend alongside the flues f f fora great part of their length, andtwo or more passages, h h', are provided forming communications at diferent points between the fines. By this means' a more uniform combustion is maintained in the chamber B than if the draft were from one point only.

Inthe side walls ofthe furnace are provided openings mm,of suitable size for the introduction ofthe nail-plates onto and their removal from the floor Z) of the chamber where they are to be heated. I also provide the furnace with an attachment whereby it may be used for bluing tacks, as illustrated in Figs. l and 3, although I have shown the furnace in Figs. 4 and 5 without the attachment. This attachment consists of a hollow cylinder, S, extend` ing longitudinally through the combustion chamber, and through the front and back walls,and mounted on anti-friction rollers s s. so as to lie at a slight inclination, as illustrated in Fig. l. `rlhe hollow cylinder or drum is provided with gearing rer other means whereby a rotary motion may be imparted to it, so that the tacks being introduced into'the eylinder at the upper end-are yeau/sed to slowly roll Vover `and over down to the lower end, while subjected to the surrounding heat of the combustion-chamber, so that they will at length 'fall from the lower end of the hollow cylinder in the desired blued condition.

I claim as my invention- 1. The combinationofthecombustion-chamber and communicating regenerative chambers with fines ff and adjacent fines H H', communicating with the said iiues f f at different points along the lines, all substantially as and for the purpose specified.

2. A nail and tack furnace having a com bustion-chamber `provided with a plate-heat ing floor, and having a bluing-eylinder in the inder extending at an inclination through said 1o combustionchamber7 all substantially as set combustion-chamber. forth. In testimony whereof I have signed my 3. Thecombination ofthecombustionohamnaine to this specification in the presence 0f 5 berof :inail-furnace with n, rotary bluing-oyltwo subscribing Witnesses.

inder ext-ending through said chamber, as set GOTTLOB ROWE. forth. y Witnesses: 4. The combination of the colnbstioncham- ROBERT ADAMS,

ber of a nailfurnace with a rotary bluing-oyl- SWARTZ MILLER. 

